I would do it, but I wouldn't do it to change things. I'd use it to see those who have passed on that I love and to experience some past events (ie: the Pan-Am Exhibition that we had in here in Buffalo). However, I'd like to be able to pick the place, time, event, etc. I think they'd kick me out of a time travel machine b/c I would want things so specific!!! I'd love to know what it was like growing up in my Grandmother's family ... so I'd have to somehow get hooked up w/them. Of course, in time travel, you can't reveal you're from the future, so I don't know how I'd hook up w/them. I'd also love to go back in time and meet certain famous people. Again, the time travel machine would have to have a special device to "hook me up"!
ETA -- I would not want to go forward in time .. only backwards!